It is now widely thought that what sailors saw instead of Kraken was the giant squid (Architeuthis ... and why did it take so long to find the real-life "Kraken"? Let's find out.

Not only are there the basic tenets of marine biology to contend with, but Nautilus’s CGI giant squid is really giant. The Nautilus, Nemo’s submarine ... needing to find 10 hours of story ...